package test;

import android.os.Handler;
import android.os.Looper;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;

/**
 * @author: rongfeng
 * @date: 2021/4/25
 * @description
 */
public class A {

    C c;

    public void a(boolean is){
        if(c==null){
            c = new C() {
                @Override
                public void callback() {
                    System.out.println(is);
                }
            };
        }
    }


}
